Goveenoe foe steam engines



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R. M. BECK.

GOVERNOR FOR STEAM ENGINES. No. 318,852. Patented May 26, 1885.

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R. M. BECK. GOVERNOR FOR STEAM ENGINES.

No. 318,852. Patented May 26, 1885f r3 Films mmum n w. Wuhingkm. a. c.

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R. M. BECK.

GOVERNOR FOR STEAM ENGINES. No. 318,852. Patented May 26, 1885.

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ROBERT M. BECK, OF GHAMBERSBURG, PENNSYLVANIA.

GOVERNOR FOR STEAM-ENGlNES.

EPECIEIGATIOIQ' forming part of Letters Patent No. 318,852, dated May26, 1885.

Application filed February 19, 1885. (X0 model.)

To all 107L012 it may concern.-

Be it known that 1, ROBERT M. Bnorga citizen of the United States,residing at Chambersburg, in the county of Franklin and State ofPennsylvania, have invented certain new and useful Improvements inGovernors for Steam-Engines; and I do declare the following to be afull, clear, and exact description of the invention,such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to theletters and fig ures of reference marked thereon, which form a part ofthis specification.

My invention has for its object the improvement of that class ofwheelgovernors for slidevalve steam-engines in which the governor wheelis keyed to the engine-shaft,and carries weighted levers that arepivoted within the wheel-rim, said levers being connected by links tothe arms of a vibratory sleeve,which is mounted on the hub of thegovernor-wheel and connected to a shifting eccentric, having an armwhich is pivoted to said wheel.

My invention consists in certain peculiarities in the construction andcombination of parts, as hereinafter more fully described and claimed.

In the annexed drawings, illustrating the invention, Figure 1 representsa face view of a governor-wheel provided with a shifting eccentric andembodying my improved arrangement of vibratory sleeve, weighted levers,springs, and links for actuating said eccentric. Fig. 2 is a verticaltransverse section ofFig. 1. Fig. 3 shows the governor-wheel, witheccentric-actuating mechanism reversed. Fig. 4 is a plan view of theeccentric; and Fig. 5 represents a plan and elevation of the armedsleevc,which is arranged to vibrate on the hub of the governor-wheel.

Like letters of reference designate like parts in the several views.

The eccentric A is provided with an arm, A, and is arranged to swingover the engineshaft N from a pin, M, by which said arm is pivotallyconnected to a boss on the flanged casing or governor-wheel G, which issecurely keyed to the engine-shaft so as to rotate therewith. A sleeveor collar, B, having two arms, B B, is mounted on the hub of the wheelC- 'back of the eccentric, and is vibrated by means of links F F thatconnect the arms B B to the ends of levers E E,that are fulcrumed tolugs E E within the rim of the wheel. These levers E E carry adjust-ableweights D D, and the free end of each lever is connected to the pivotalpoint of the opposite lever by a spiral spring, K, having an adjustingdevice attached to one end, by which the tension of the spring can bealtered as required, so as to govern the travel of the weighted levers.This adjusting device consists, preferably, of a sleeved connection, J,having a right-hand screw in one end and a left-hand screw in the otherend, one of said screws being connected to the spring K and the otherone to the weighted lever E.

LL are pins for connecting the springs K and the sleeves J to the leversE, links F, and to the lugs E on the rim of the wheel.

P P are bolts for connecting the links F F to the arms B B of the sleeveor collar B,that is supported on the hub of the wheel. The armedsleeve Bis provided with bosses I I for the attachment of links GG, by whichconnection is made with bosses H H on the eccentricarm, but when thegoverning mechanism is reversed, as illustrated in Fig. 3, the linkswill be connected to similar bosses, H H, on the body of the eccentricat its other end, the sleeve B with its bosses I I being also reversed.

The operation and advantages of this governing mechanism will be readilyunderstood. It will be seen that the centrifugal action of the weightedlevers E E tends to vibrate the armed sleeve B on the hub of the wheel,the travel of the levers being controlled, however, by the tension ofthe springs K K; but as the speed of the engine becomes excessive theten sion of the springs is overcome, and the armed sleeveB is enabled tovibrate snfficiently to shift the eccentric A through theconnecting-links G G, so as to automatically actuate the valverod anddiminish or cut off the supply of steam. As the revolutions of the shaftdecrease, the springs KK exert greater force on the weighted levers, andthe mechanism is thereby caused to resume its normal position. It willbe seen that the rim of the wheel 0 is provided with two sets offnlcruming lugs, E E, for the weighted levers E E, so that the mechanismcan be readily reversed, and thus made to oo- IOO cupy the positionshown in Fig. 1, or that shown in Fig. 3, as required. NVhen arranged asshown in Fig. 1, the weights D D will swing with the wheel, while thearrangement shown in Fig. 3 allows them to swing against the wheel,their centrifugal force in both cases, however, being exerted in adirection tangential to the rotation of the wheel and its shaft. Vhenarranged as shown in Fig. 3, with the sleeve B reversed and the links GG connected to bosses H H at the upper part of the eccentric, a greaterrange of travel is given to the weighted levers.

In order to prevent the eccentric from passing mid-gear, a removablestop, 0, is keyed in one side between it and the shaft N. This stop isattached to the opposite side when the engine is reversed.

As represented in the drawings, the eccentric is at mid-gear, in whichposition all steam is cut off from the engine-cylinder. WVhen theeccentric is at full throw, it is capable of giving a steam-opening oftwelve inches area, the eccentric being then at an angular advance ofthe crank-pin ofone hundred and twenty degrees.

In Fig. 3, S is the eccentric-strap, T the eccentric-rod, and W' is aportion of the engineframe. lVhen the heavy side of an eccentric isrotating from a lower to a higher position, there is ordinarily atendency thereof to fluctuate out of true and correct position under theinfluence of gravity, especially when the speed of the engine isdiminished. This difficulty I overcome by means of an auxiliary spring,V, that may be attached at one end to one side of the eccentricarm andat its other end to the rim of the governor-wheel, as shown in Fig. 1.

Instead of arranging the auxiliary spring V as shown in Fig. 1, it ispreferably secured over or around a rod, R, provided near its lower endwith a fixed collar, Q, on which said spring rests. This rod is pivotedto the engine-bed directly under the eccentric, as shown in Fig. 3, soit can vibrate with the motion of the eccentric; and the upper end ofthe spring is connected to the bottom of the eccentricstrap, so thatwhen the eccentric moves down ward it will compress the spring, theexpansive force of which, as the eccentric moves upward, willcounterbalance the dead-weight of the eccentric and its connections, andthereby overcome any tendency to downward fluctuation due to the forceof gravity. It will be seen that when arranged as shown in Fig. 1

the tension of the spring V is exerted to a greater or less degreeconstantly to overcome any tendency to irregularity in the motion of theeccentric, while by the arrangement shown in Fig. 3 the spring only actsat the moment required, by reason of its expansive force acting againstthe compression caused by the weight of the eccentric. In the lattercase, therefore, the strain is not constant. By either arrangement ofthe spring V any sudden fluctuation of power is prevented fromcausingwheel and connected to the armed sleeve by links F F, the adjustablesprings K K, and the links G G for connecting the eccentric and armedsleeve, substantially as described.

2. The combination, with the shifting eccentric A and the flangedgovernor-wheel '0, having lugs E E, of the vibratory sleeve B, providedwith arms B B, the links G G, adjustable weighted levers E E, links F F,and adjustable springs K K, substantially as described.

3. The combination of the shifting eccentric A, the governor wheel 0,the reversible weighted levers E E, fulcrumed to said wheel, a vibratorysleeve, B, mounted on the hub of said governor-wheel, in connection withthe eccentric, and having arms B B, that are connected to the weightedlevers by links F F, the adjustable springs K K, and the auxiliaryspring V, substantially as described.

4. The combination, with a shifting eccentric, of a spring, V, connectedto the eccentricstrap and to a rod, B, that is pivoted to theengine-frame, said spring being adapted to act expansively against theeccentric for the purpose of overcoming any tendency to irregularity inthe motion of the eccentric, substantially as described.

In testimony whereofI affix my signature in presence of two witnesses.

. ROBERT M. BECK. \Vitnesses:

W. B. BROWN, D. K. \VUNDERLIOH.

